Rotary drilling apparatus.



E. E. GREVE. ROTARY DRILLING APPARATUS. APPLICATION FILED JULY I4. 1917- Patented Mar. 19, 1918.

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FIBJ

INVENTOR WITNESSES UNITEDSTATES PATENT OFFICE.

EDGAR E. GREVE, OF BELLEVUE, PENNSYLVANIA, ASSIGNOR TO OIL WELL SUPPLY COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

ROTARY DRILLING APPARATUS.

Specification of Letters Patent.

Patented Mar. 19, 1918.

To all whom it may concern:

Be it known that I, EDGAR E. GREVE, a citizen of the United States, residing at Bellevue, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in R0- tary Drilling Apparatus, of which the following is a specification.

This invention relates to improvements in well drilling apparatus of the hydraulic rotary type having means for rotating the drill pipe and permitting free feed movement thereof.

The principal objects of the present invention are, to provide simple and efficient means for rotating the drill pipe, for suspending the drill pipe or string, for turning the drill pipe or string while suspended, and the provision of a new and improved separable clamping or bushing member employed in apparatus of the character to which my invention relates.

In the accompanying drawings, which illustrate applications of my invention,

Figure 1 is a vertical sectional view of a rotary drilling apparatus embodying my invention and showing sections of drill pipe in elevation;

Fig. 2 is a top plan of drive ring that may be employed;

Fig. 3 is a top plan particularly showing sectional drive ring bushing and slips in position engaging a section of the drill pipe;

1 Figs. 4 and 5 are perspective views of s ips;

Fig. 6 is a vertical sectional view of drivering taken on line 6-6 of Fig. 2;

Fig. 7 is a vertical sectional view taken 'on line 77 of Fig. 3 with the slips and drill pipe omitted;

Fig. 8 is a vertical sectional view of drivering bushing taken on line 8-8 of Fig. 3;

Fig. 9 is a horizontal sectional view taken on line 99 of Fig. 8;

Fig. 10 is a detail elevational view of a liner or stem rotating element; and

Figs. 11 and 12 are diagrammatlc sectional views, showing in Fig. 11 one section of grip stem and its coupling, the latter resting upon liners, and F1g. 12 showing two sections of grip stem with liners or stem rotating elements shifted above. the

coupling.

In carrying out my invention, I employ a sectional grip or drive stem, the sections of which are non-circular in cross section, with each section of similar contour, and couple the sections together by a coupling member, said coupling member projecting outwardly beyond the surface of the adjacent sections to form a shoulder or abutment adapted to cooperate with a bushing or liners when the travel of a coupling member brings an end thereof into contact with the bushing or the liners. The stems are particularly shown by Figs. 11 and 12 of the drawings, the sectional stem being indicated by a, said sections being coupled together by coupling member I).

It will be understood that the sectional stem is adapted to be joined to the sectional drill pipe 0 shown in Fig. 1, said sectional drill pipe 0 having its adjacent sections joined together by a coupling member, d.

The stem a is adapted to cotiperate with a drive ring bushing 2, said bushing in turn cooperating with a drive ring 3 or directly with the table 4: of the rotary, as may be desired. While I have shown the drive ring arrangement in the drawings, it should be understood that the elements of the ring which cooperate with the bushing may form art of the rotary table itself, thus dispens mg with the use of a separate drive ring. The rotary table 4 may e of any desired form, and driven in any desired manner. Various ways of forming and driving such tables are disclosed in prior patents, as for instance. patent to R. E. Kline, #1,099,453 of June 9, 1914, in which the table is adapted to be driven from a suitable source of ower and is provided with means for seatmg and connecting a drive ring thereto.

The drive ring 3, as illustrated and as preferred, comprises a disk like structurehaving apertures 55, through which pins 6 are passed for attaching the ring to the table, and an elongated central aperture 7 having interiorly disposed vertically extending fiat walls 7. Ring 3 is also formed with cut-away portions 8 communicating with opening 7 and through which-a drill bit a; of considerable diameter may be passed. The walls of the cut-away portions 8 are adapted to en age 1ugs or PIQJBCtlOIlS 9 formed onthe ushmg 2 (see Fig. 9). In

assembling the parts, the lugs 9 of the drive ring bushing are adapted to be entered in the cut-away portions 8 and co-act with the walls thereof for driving the said bushing.

The bushing .2, as illustrated, includes two separable members adapted to be hinged together and to permit opening and closing movements. Each member is of an elongated character and has two straight interior wall surfaces 10 with shoulders 11 and 12 formed at the upper and lower ends of said straight vertical surfaces, thereby providing a construction adapted to receive liners or stem engaging elements 13, the latter being secured to the flat faces or interior surfaces of the bushing by means of bolts 14. It will be understood that the size of the liners may vary in order to accommodate stems of various diameters.

lhe interior upper portion of the bushing 2 is formed with a gradual taper and with interior curved walls, thereby forming a space to receive a set of slips including two longitudinally grooved slips 15 and a vertically grooved slip 16. Slip 16 is formed on its rear face with an outwardly projecting lug 1?, saidlug adapted, when this slip is placed in operative position, to engage a slot 18 formed in a wall of the upper portion of the bushing. The slips 15 and 16 are shown in assembled position in Figs. 1 and 3. T he ring bushing forms a characteristic and important feature of the present invention and, as will be readily understood, cooperates with other parts of the apparatus for efiecting the operations of rotating the stem and the drill pipe, suspending the drill pipe or string, and co-acts with the slip 16 for turning the drill pipe While suspended by the slips. It is also of such construction that it may be utilized for rotating the stem while it is partially raised from the drive ring. This last mentioned position of the drive ring bushing is particularly shown by Fig. 12. This latter feature of construction is particularly useful in cases where a sectional drive stem is employed. The advantages of employing a sectional drive stem in connection with the rotary mechanism for driving the drill pipe are set forth in a companion application Serial Number 93,919, filed April 27, 1918, wherein such a stem and drive-ring bushing is fully illustrated, described and claimed.

As above stated, the construction herein shown permits the employment of stem engaging elements or liners 13 to fit noncircular stems of different diameters, and in some instances, it is not necessary in the operations of drilling and raising and lowering the drill pipe to remove the liners, thus, for example, when a six inch stem is employed for driving a four inch drill pipe, the drill pipe and its couplings may be passed through the bushing without removing the liners. In the form illustrated by Fig. 1, it is assumed that the stem employed is a six inch stem and the drill pipe four inches. If a six inch stern were used for driving a six inch drill pipe, it would, of course, be necessary to remove the liners in order to provide suflicient clearance for the pipe couplings.

What I claim is 1. In rotary drilling apparatus, the combination with an apertured rotary table, of a separable elongated bushing loosely mounted therein, said bushing having means interiorly thereof to receive stem rotating elements and having means above the first mentioned means to receive string suspending elements.

2. In rotary drilling apparatus, the combination with an apertured rotary table, of a separable elongated bushing loosely mounted therein, said bushing having its interior tapered at its upper end to receive slips and formed below the tapered portion to receive stem engaging elements.

3. In rotary drilling apparatus, the combination with an apertured rotary table, of a separable elongated bushing loosely mounted therein, said bushing having its interior tapered at its upper end to receive slips, slips located in the tapered portion, and formed below the tapered portion to receive stem engaging elements, and stem engaging elements mounted therein.

4. In rotary drilling apparatus, the combination with an apertured rotary table, of a separable elongated bushing loosely mounted therein, said bushing having its interior tapered at its upper end to receive slips and formed below its tapered portion to receive a stem engaging element and a set of slips mounted in the tapered portion, said bushing having a longitudinally extending slot, and one of the slips having a lug on its rear face with saidlug entered in the longitudinally extending slot of the bushing.

5. In rotary drilling apparatus, the com bination with an apertured rotary table, of a drive-ring mounted thereon formed with lug receiving recesses, and a separable elongated bushing having means interiorly thereof to receive a stem rotating element and means to receive string suspending elements and lugs formed on the exterior thereof and adapted to be entered inthe recesses of the drive ring.

6. In rotary drilling apparatus, the combination with an apertured rotary table, of an elongated bushing loosely mounted therein, said bushing having means interiorly thereof to receive a stem rotating element and having means above the first mentioned means to receive string suspending elements.

7. In rotary drilling apparatus, the combination with an apertured rotary table, of a drive ring mounted thereon formed with lug In testimon whereof I aflix my signature receiving recesses, e111 elofigategl bushing havin presence 0 two Witnesses. ing means interior y t ereo to receive a stem rotating element and means to receive EDGAR GREVE 5 string suspending elements, and lugs formed Witnesses:

on the exterior thereof and adapted to be en- J. M. GEOGHEGAN, tered in the recesses of the drive ring. Loxs WINEMAN. 

